Piezoelectric device and method for manufacturing piezoelectric device

Abstract

A piezoelectric device includes: a container; a piezoelectric resonator element accommodated in the container; a circuit element accommodated in the container so as not to overlap with the piezoelectric resonator element in a plan view; and a mounting stage to which the piezoelectric resonator element is fixed. The mounting stage is fixed inside the container.

1. A piezoelectric device, comprising:
 a container, the container including a step portion that surrounds a bottom portion to define a recessed area within the container; 
 a piezoelectric resonator element accommodated in the container, a free end of the piezoelectric resonator overlapping the step portion; 
 a circuit element accommodated in the container so as not to overlap with the piezoelectric resonator element in a plan view; and 
 a mounting stage to which the piezoelectric resonator element is fixed, the mounting stage being fixed on the bottom portion inside the container. 
 
     
     
       2. The piezoelectric device according to  claim 1 , wherein the mounting stage is disposed adjacent to the circuit element, and the piezoelectric resonator element is fixed to the mounting stage so as to extend to a side opposite to a side where the circuit element is disposed. 
     
     
       3. The piezoelectric device according to  claim 2 , wherein: the piezoelectric resonator element includes an excitation electrode and a leading electrode coupled to the excitation electrode; the mounting stage includes a connection electrode coupled to the leading electrode of the piezoelectric resonator element; and the circuit element includes a connection terminal coupled to the connection electrode of the mounting stage by a metal wire. 
     
     
       4. The piezoelectric device according to  claim 1 , wherein the mounting stage is fixed inside the container by an adhesive. 
     
     
       5. The piezoelectric device according to  claim 1 , wherein the piezoelectric resonator element is fixed to the mounting stage in a cantilever fashion and the container includes, inside the container, a supporting portion that is contactable with an end portion of the piezoelectric resonator element. 
     
     
       6. A method for manufacturing a piezoelectric device, comprising:
 fixing a mounting stage to a bottom portion of a container in which a piezoelectric resonator element and a circuit element are accommodated so as not to overlap with each other in a plan view, the container including a step portion that surrounds the bottom portion to define a recessed area within the container; 
 fixing the piezoelectric resonator element to a connection electrode of the mounting stage, a free end of the piezoelectric resonator element overlapping the step portion; 
 fixing the circuit element to the bottom surface of the container; 
 coupling a connection terminal of the circuit element and the connection electrode of the mounting stage by a metal wire; and 
 air-tightly sealing the container with a lid.